@AgathaSorceress I wonder if there is a really technical reason for that

@elise @AgathaSorceress because usernames are used as identifiers (rather than, idk, like a UUID or something)
it's a classic design mistake imo

@elise @AgathaSorceress ok more than this activitypub doesn't have a provision for aliasing actors
(which is a larger problem imo. like if you had a server available on mainline internet and also tor, there is no way to say the actors @ whatever.onion are the same ones as actors @ myinstance.horse for all intents and purposes those are two completely different sets of actors)